Claude Opus 4.6 Finds 500+ High-Severity Flaws Across Major Open-Source Libraries
Summary
Anthropic's Claude Opus 4.6, a new AI language model, discovered over 500 previously unknown high-severity security flaws in popular open-source software libraries like Ghostscript, OpenSC, and CGIF by analyzing code the way a human security researcher would. The model was able to find complex vulnerabilities, including some that traditional automated testing tools (called fuzzers, which automatically test software with random inputs) struggle to detect, and all discovered flaws were validated and have since been patched by the software maintainers.
Solution / Mitigation
The CGIF heap buffer overflow vulnerability was fixed in version 0.5.1. The source text notes that Anthropic emphasized the importance of 'promptly patching known vulnerabilities,' but does not describe mitigation steps for the other vulnerabilities beyond noting they have been patched by their respective maintainers.
Classification
Affected Vendors
Related Issues
Original source: https://thehackernews.com/2026/02/claude-opus-46-finds-500-high-severity.html
First tracked: February 12, 2026 at 02:20 PM
Classified by LLM (prompt v3) · confidence: 92%